CN112461755B - Tensile shear strength test device - Google Patents
Tensile shear strength test device Download PDFInfo
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- CN112461755B CN112461755B CN202011316809.7A CN202011316809A CN112461755B CN 112461755 B CN112461755 B CN 112461755B CN 202011316809 A CN202011316809 A CN 202011316809A CN 112461755 B CN112461755 B CN 112461755B
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- frame
- side wall
- sample
- loading surface
- clamping rod
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
Abstract
The invention belongs to the technical field of detection devices and discloses a tensile shear strength test device. The sample fixing upper frame is connected with the upper clamping rod with threads and is locked by a nut. And the sample upper loading surfaces with threaded holes at two ends are connected with the sample fixing upper frame through upper loading surface fixing pins. The upper baffle is mounted on the sample fixing upper frame through two screws. One end of the sample fixing lower frame is arranged in the guide grooves on two sides of the sample fixing upper frame through two threaded lower loading surface fixing pins, and the other end of the sample fixing lower frame is connected with a threaded lower clamping rod and locked by a nut. The lower baffle is mounted on the sample fixing lower frame through two screws. The test sample is in a free state before loading, so that the test sample is prevented from being damaged in advance by abnormal external force in the test clamping process, and the detection accuracy and reliability are ensured.
Description
Technical Field
The invention belongs to the technical field of detection devices, and particularly relates to a tensile shear strength testing device.
Background
The bonding strength of the bulletproof ceramic wafer of the armored seat and the carbon fiber chair basin body is one of important assessment indexes of the safety performance of the seat, in order to monitor the bonding strength index of the seat, a small sample piece made of the same material is selected, and a furnace test piece made of the same bonding process with the seat is subjected to tensile shear strength detection to assess the bonding strength of the seat and ensure the safety performance of the seat. A typical tensile shear specimen is shown in figure 1. At present, the method that tensile shear specimen shear strength detected and adopted is, goes up the splice plate and is connected with the testing machine after passing through anchor clamps switching, and lower splice plate is direct to be connected with the testing machine chuck, and the main defect that exists has:
1) The force bearing surface of the upper bonding plate is poor in fitting property with the loading surface of the switching clamp, so that the error of a detection result is large;
2) The lower bonding plate is rigidly connected with a chuck of the testing machine, so that a test piece is easily twisted or bent to be damaged in advance during clamping, and the detection result is invalid.
Disclosure of Invention
The technical problems to be solved by the invention are as follows:
the tensile shear strength testing device can realize quick clamping of a sample, the sample is in a free state before loading, damage caused by abnormal external force in the testing and clamping process is avoided, and detection accuracy and reliability are guaranteed.
A tensile shear strength test device, the sample to be tested includes: the rigid rectangular plate is bonded with the front end face of the square plate;
the device comprises: the device comprises an upper frame, an upper clamping rod, a lower frame, a lower clamping rod, a lower loading surface fixing pin and a sample upper loading surface;
the lower frame is a rectangular frame; the upper frame is a rectangular frame without a bottom beam;
sliding chutes are arranged in the left side wall and the right side wall of the upper frame;
the lower frame is arranged between the left side wall and the right side wall of the upper frame; the left end and the right end of the lower frame top beam are provided with first threaded holes;
one end of the lower loading surface fixing pin is processed with external threads, and the other end of the lower loading surface fixing pin is a polished rod; the threaded end is screwed into first threaded holes at two ends of a top beam of the lower frame, and the polished rod end is arranged in sliding grooves on two side walls of the upper frame;
the lower frame is matched with the sliding groove through a lower loading fixing pin polished rod end so as to slide up and down relative to the upper frame;
the upper clamping rod is fixed on the top beam of the upper frame, and the lower clamping rod is fixed on the bottom beam of the lower frame;
the upper loading surface of the sample is a rectangular strip and is fixed between the left side wall and the right side wall at the bottom end of the front end surface of the upper frame;
the upper sample loading surface is used for loading the lower end surface of the square sheet;
the lower frame top beam is used for loading the upper end face of the rectangular plate.
Further, the apparatus further comprises: an upper baffle plate; the upper baffle is fixed between the left side wall and the right side wall of the front end face of the upper frame, and the upper baffle is used for preventing the sample from falling.
Further, the apparatus further comprises: two screws;
the screws are fixed on the front end surfaces of the left side wall and the right side wall of the upper frame; go up baffle one end and right side screw hinge, go up the baffle other end and be equipped with downward open-ended U type groove, U type groove is hung on the left side screw, it is mobile to be used for making things convenient for the sample installation to go up the baffle.
Furthermore, the device also comprises a lower baffle plate which is arranged on the rear end surfaces of the left side wall and the right side wall of the lower frame.
Further, the apparatus further comprises: an upper loading surface fixing pin; second threaded holes are formed in the left end and the right end of the sample loading surface, and through holes in the left direction and the right direction are formed in the left side wall and the right side wall of the upper frame; the upper loading surface fixing pin penetrates through the through hole and is screwed into the second threaded hole; the upper loading surface fixing pin is used for disassembling the upper loading surface.
The upper loading surface can be automatically aligned around the axis according to the angle of the sample loading contact surface so as to ensure the accuracy of the detection result.
Further, the four side surfaces of the loading surface on the sample are different in shape so as to adapt to loading surfaces of different shapes.
Furthermore, the upper frame top beam is provided with an upper through hole in the vertical direction, the lower end of the upper clamping rod is a threaded end, and the upper clamping rod penetrates through the upper through hole and is fixed through a first nut.
Further, the lower frame bottom beam is provided with a lower through hole in the vertical direction, the top end of the lower clamping rod is a threaded end, and the lower clamping rod penetrates through the lower through hole and is fixed through a second nut.
The invention has the beneficial effects that:
1. simple and convenient operation, simple structure and easy processing
2. After the sample is installed, only the upper and lower loading surfaces are in contact with the corresponding surfaces of the detection tool, and the sample is in a free state, so that the sample is prevented from being damaged in advance due to abnormal external force caused by installation; in addition, the loading surface can rotate around the axis on the tool, and can be automatically attached according to the angle of the sample loading surface in the loading process, so that the deviation of the detection result caused by the deviation of the stress direction is avoided.
3. When a plurality of samples are detected, the detection tool does not need to be detached, only the test piece needs to be replaced, the test piece is clamped conveniently and quickly, and the detection efficiency is improved.
Drawings
FIG. 1 is a schematic view of a structure of a sample to be tested;
FIG. 2 is a schematic view of a tensile shear strength testing apparatus;
FIG. 3 is a schematic view of an upper frame structure;
FIG. 4 is a schematic view of a lower frame structure;
in the figure: 1. the test sample clamping device comprises a test sample fixing upper frame, 2. An upper clamping rod, 3. A test sample upper loading surface, 4. An upper loading surface fixing pin, 5. An upper baffle, 6. A screw, 7. A test sample fixing lower frame, 8. A lower clamping rod, 9. A first nut, 10. A second nut, 11. A lower baffle and 12. A lower loading surface fixing pin.
Detailed Description
A tensile shear strength testing apparatus, as shown in fig. 2, the material is structural alloy steel, the apparatus includes: the device comprises a sample fixing upper frame 1, an upper clamping rod 2, a sample upper loading surface 3, an upper loading surface fixing pin 4, an upper baffle 5, a screw 6, a sample fixing lower frame 7, a lower clamping rod 8, a first nut 9, a second nut 10, a lower baffle 11 and a lower loading surface fixing pin 12.
The upper frame is a rectangular frame without a bottom beam, as shown in fig. 3; sliding chutes are arranged in the left side wall and the right side wall of the upper frame;
the lower frame is a rectangular frame as shown in fig. 4; the lower frame is arranged between the left side wall and the right side wall of the upper frame; the left end and the right end of the top beam of the lower frame are provided with first threaded holes;
one end of the lower loading surface fixing pin is provided with an external thread, and the other end of the lower loading surface fixing pin is a polished rod; the threaded end is screwed into first threaded holes at two ends of a top beam of the lower frame, and the polished rod end is arranged in sliding grooves on two side walls of the upper frame;
the lower frame is matched with the sliding groove through a lower loading fixing pin polished rod end so as to slide up and down relative to the upper frame;
the upper clamping rod is fixed on the top beam of the upper frame, and the lower clamping rod is fixed on the bottom beam of the lower frame;
the upper loading surface of the sample is a rectangular strip and is fixed between the left side wall and the right side wall at the bottom end of the front end surface of the upper frame;
the upper sample loading surface is used for loading the lower end surface of the square sheet;
the lower frame top beam is used for loading the upper end face of the rectangular plate.
The upper baffle is fixed between the left and right side walls of the front end face of the upper frame and is used for preventing the sample from falling.
The screws are fixed on the front end surfaces of the left side wall and the right side wall of the upper frame; go up baffle one end and right side screw hinge, go up the baffle other end and be equipped with downward open-ended U type groove, U type groove is hung on the left side screw, goes up the movable sample installation that is used for of baffle.
The lower baffle plate is arranged on the rear end surfaces of the left side wall and the right side wall of the lower frame.
Second threaded holes are formed in the left end and the right end of the loading surface of the sample, and through holes in the left direction and the right direction are formed in the left side wall and the right side wall of the upper frame; the upper loading surface fixing pin penetrates through the through hole and is screwed into the second threaded hole; the upper loading surface fixing pin is used for disassembling the upper loading surface.
The upper loading surface can be automatically aligned around the axis according to the angle of the sample loading contact surface so as to ensure the accuracy of the detection result.
The four sides of the loading surface on the sample are different in shape so as to adapt to loading surfaces of different shapes.
The upper frame top beam is provided with an upper through hole in the vertical direction, the lower end of the upper clamping rod is a threaded end, and the upper clamping rod penetrates through the upper through hole and is fixed through a first nut.
The lower frame floorbar is equipped with the lower through-hole of direction from top to bottom, and lower supporting rod top is the screw thread end, and lower supporting rod passes lower through-hole and passes through the second nut fixed.
The structure of the invention is installed in the following sequence: the sample fixing upper frame 1 is connected with the upper clamping rod 2 with screw threads and is locked by a second nut 10. And a sample upper loading surface 3 with threaded holes at two ends is connected with the sample fixing upper frame 1 through an upper loading surface fixing pin 4. The upper baffle 5 is mounted on the sample-holding upper frame 1 by two screws 6. One end of the sample fixing lower frame 7 is installed in the guide grooves on both sides of the sample fixing upper frame 1 through two threaded lower loading surface fixing pins 12, and the other end is connected with a threaded lower clamping rod 8 and locked by a first nut 9. The lower baffle 11 is mounted on the sample-fixing lower frame 7 by two screws 6.
The working principle is as follows: the upper clamping rod 2 and the lower clamping rod 8 are respectively clamped in a chuck of the testing machine, the test piece is installed in the clamp, the upper loading surface 3 and the lower sample fixing frame 7 can respectively rotate around the upper loading surface fixing pin 4 and the lower loading surface fixing pin 12 during installation, so that two stress surfaces of the test piece are respectively attached to the loading surfaces of the upper sample loading surface 3 and the lower sample fixing frame 7, and the stress directions are ensured to be consistent. The upper baffle 5 and the lower baffle 11 can avoid the ejection of the sample after the sample is damaged.
Claims (8)
1. A tensile shear strength test device, the sample to be tested includes: the rigid rectangular plate is bonded with the front end face of the square plate;
the method is characterized in that: the device comprises: the device comprises an upper frame, an upper clamping rod, a lower frame, a lower clamping rod, a lower loading surface fixing pin and a sample upper loading surface;
the lower frame is a rectangular frame; the upper frame is a rectangular frame without a bottom beam;
sliding grooves are arranged in the left side wall and the right side wall of the upper frame;
the lower frame is arranged between the left side wall and the right side wall of the upper frame; the left end and the right end of the lower frame top beam are provided with first threaded holes;
one end of the lower loading surface fixing pin is provided with an external thread, and the other end of the lower loading surface fixing pin is a polished rod; the threaded end is screwed into first threaded holes at two ends of a top beam of the lower frame, and the polished rod end is arranged in sliding grooves on two side walls of the upper frame;
the lower frame is matched with the sliding groove through a lower loading fixing pin polished rod end so as to slide up and down relative to the upper frame;
the upper clamping rod is fixed on the top beam of the upper frame, and the lower clamping rod is fixed on the bottom beam of the lower frame;
the upper loading surface of the sample is a rectangular strip and is fixed between the left side wall and the right side wall at the bottom end of the front end surface of the upper frame;
the upper sample loading surface is used for loading the lower end surface of the square sheet;
the lower frame top beam is used for loading the upper end face of the rectangular plate.
2. The tensile shear strength test apparatus according to claim 1, wherein: the device further comprises: an upper baffle plate; the upper baffle is fixed between the left side wall and the right side wall of the front end face of the upper frame.
3. A tensile shear strength test apparatus according to claim 2, wherein: the device further comprises: two screws;
the screws are fixed on the front end surfaces of the left side wall and the right side wall of the upper frame; go up baffle one end and right side screw hinge, go up the baffle other end and be equipped with downward open-ended U type groove, U type groove is hung on the left side screw.
4. A tensile shear strength test apparatus according to claim 1, wherein: the device also comprises a lower baffle plate which is arranged on the rear end surfaces of the left side wall and the right side wall of the lower frame.
5. A tensile shear strength test apparatus according to claim 1, wherein: the device further comprises: an upper loading surface fixing pin; second threaded holes are formed in the left end and the right end of the sample loading surface, and through holes in the left direction and the right direction are formed in the left side wall and the right side wall of the upper frame; the upper loading surface fixing pin penetrates through the through hole and is screwed into the second threaded hole; and the upper loading surface fixing pin is used for disassembling the upper loading surface of the sample.
6. The tensile shear strength test apparatus of claim 5, wherein: the four sides of the loading surface on the sample are different in shape.
7. A tensile shear strength test apparatus according to claim 1, wherein: the upper frame top beam is provided with an upper through hole in the vertical direction, the lower end of the upper clamping rod is a threaded end, and the upper clamping rod penetrates through the upper through hole and is fixed through a first nut.
8. A tensile shear strength test apparatus according to claim 1, wherein: the lower frame bottom beam is provided with a lower through hole in the vertical direction, the top end of the lower clamping rod is a threaded end, and the lower clamping rod penetrates through the lower through hole and is fixed through a second nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011316809.7A CN112461755B (en) | 2020-11-20 | 2020-11-20 | Tensile shear strength test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011316809.7A CN112461755B (en) | 2020-11-20 | 2020-11-20 | Tensile shear strength test device |
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| Publication Number | Publication Date |
|---|---|
| CN112461755A CN112461755A (en) | 2021-03-09 |
| CN112461755B true CN112461755B (en) | 2022-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011316809.7A Active CN112461755B (en) | 2020-11-20 | 2020-11-20 | Tensile shear strength test device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6216531B1 (en) * | 1999-11-30 | 2001-04-17 | Flexible Products Company | Testing tool adapter |
| CN202599752U (en) * | 2012-04-27 | 2012-12-12 | 中国直升机设计研究所 | Fixture for composite material tensile shearing/180-degree peeling test |
| CN105334110A (en) * | 2015-12-08 | 2016-02-17 | 南京航空航天大学 | Loading device and method for testing tension strength of unidirectional fiber reinforced composite perpendicular to fiber direction |
| CN206876479U (en) * | 2017-05-25 | 2018-01-12 | 南京航空航天大学 | A kind of fixture for being used to test reinforced plastics interlayer shear strength |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237007B (en) * | 2013-06-07 | 2016-09-14 | 合肥通用机械研究院 | Device for testing composite fatigue crack propagation rate |
-
2020
- 2020-11-20 CN CN202011316809.7A patent/CN112461755B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6216531B1 (en) * | 1999-11-30 | 2001-04-17 | Flexible Products Company | Testing tool adapter |
| CN202599752U (en) * | 2012-04-27 | 2012-12-12 | 中国直升机设计研究所 | Fixture for composite material tensile shearing/180-degree peeling test |
| CN105334110A (en) * | 2015-12-08 | 2016-02-17 | 南京航空航天大学 | Loading device and method for testing tension strength of unidirectional fiber reinforced composite perpendicular to fiber direction |
| CN206876479U (en) * | 2017-05-25 | 2018-01-12 | 南京航空航天大学 | A kind of fixture for being used to test reinforced plastics interlayer shear strength |
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| Publication number | Publication date |
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| CN112461755A (en) | 2021-03-09 |
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